Comparison

e4 vs Greystone

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

e4

Access in-depth biblical and theological courses taught by distinguished scholars. Explore topics from apologetics to faith and science through lectures and Q&A sessions. Offers over 120 hours of content, with some courses available for free and others at a low cost.

Highlights
  • Biblical and theological courses
  • Taught by distinguished scholars
  • Lectures and Q&A sessions
  • Transcribed content
  • Synchronized video and text
  • Over 120 hours of content
Features
Read full description

We filmed distinguished biblical scholars & theologians teaching & interacting with deeply engaged participants. Themes considered ranged from Apologetics to Martin Luther, from Spiritual Formation to Medical Ethics, from The Divine Conspiracy to Faith & Science. The courses varied from 5-day intensives to a 2-hour seminar. There were lectures and Q&A sessions. We edited the footage, transcribed the lectures & interactions, and integrated all of it in synchronized form to present to you about 120 thought-provoking hours of genuine insight. Faith seeking understanding, discovering wisdom. That’s our hope, in creating e4. Three courses are free, and the rest cost US$5 or less. That's a pretty incredible deal for the quality, depth and scope of these courses. e4 contains the following courses: 1. The Provocative Church • Graham Tomlin (14 hours). What kind of church might offer disenchanted postmoderns genuine trust, hope, & love? Graham Tomlin explores this question in a deeply moving course that is inspired by history and grounded in the scriptures. Graham is the Principal of St Paul’s Theological Centre in London and Dean of St Mellitus College. 2. Christianity: the Future • Alister McGrath (2 hours). Alister McGrath reflects on the future of Christianity. Alister is the Chair of Theology, Ministry & Education at King's College, London. 3. Apologetics • Bill Edgar (23 hours). Bill Edgar offers a historical look at Christian apologetics and culture. Bill performs jazz on the piano and offers fascinating analyses of film, art, & music. Bill is Professor of Apologetics and Coordinator of the Apologetics Department at Westminster Theological Seminary. 4. The Divine Conspiracy • Dallas Willard (19 hours). What is the good life? What does it mean to be blessed? How do we live the authentic Christian life? Dallas Willard explores these fundamental questions and offers answers rich in wisdom and biblical strength, with a focus on the Sermon on the Mount and its application to modern discipleship. Dallas is Professor in the School of Philosophy at the University of Southern California in Los Angeles. 5. Faith & Science • Alister McGrath (17 hours). Are science & religion fundamentally incompatible? Alister McGrath, a gifted theologian and experienced scientist, looks at the major historical developments in science, philosophy, & religion, dispelling myths and offering a thoughtful case for the complementary roles of religion & science. 6. Medical Ethics • David Cook (2 hours). David Cook presents a Biblical perspective on medical ethics. David is the Director of the Whitefield Institute in Oxford & Holmes Professor of Faith & Learning at Wheaton College. 7. Media Culture • Gordon Pennington (5 hours). Media consultant Gordon Pennington draws upon his marketing experience in a provocative course intended to help us understand and win the battle for our minds. Former director of marketing for Tommy Hilfiger, Gordon is an international consultant. 8. re:Formation • Graham Tomlin (24 hours). Graham Tomlin offers a creative program for church-based spiritual development, drawing from biblical discipleship narratives and the stories and traditions of the Reformation, with emphasis on Martin Luther's life & struggles. 9. Martin Luther • Graham Tomlin (9 hours). Graham Tomlin surveys Martin Luther, with a view to mining Luther’s wisdom for contemporary spiritual formation. [Note: this course is extracted from re:Formation, and is therefore completely contained in re:Formation] 10. Biblical Stewardship • Bruce Waltke, Randy Alcorn, Andy Stanley, Rick Warren & others (13 hours). Stewardship and giving are crucial areas of spiritual development. This course offers perspective from a diverse group of scholars, financial experts, & pastors. ... Notes: 1. "We"= Faith, Joe, Jonathan, Kennedy, Chad, TJ, Lauren, Sherry, Luder & Pavi. 2. Please don’t buy “Martin Luther” if you already own “re:Formation”.

About

Greystone

Features
Read full description

The app of Greystone Theological Institute, providing a rapidly growing library of thousands of hours of video and audio resources in Reformed theology, biblical studies, ethics, ministry, and spiritual formation, plus texts, live-streamed seminars, workshops, and other events. Enjoy a limited offering of free content, or subscribe for access to all content. Privacy Policy: https://www.greystoneinstitute.org/privacy-policy Terms of Service: https://treefortsystems.com/terms-of-service

Screenshots

e44 screens
Greystone4 screens

Verdict

The call

The clearest difference is iOS requirement: e4 at 7.0 against Greystone's 15.1. On price, update cadence, ads and in-app purchases there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. e4 sells 10 one-off in-app purchases and Greystone sells 3 in-app purchases, starting at $17.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

e4 ships an update every 2 months, Greystone every 3 months. The most recent releases landed on October 6, 2026 and October 11, 2026 respectively.

Scorecard1 real difference · 9 level
e4 versus Greystone: the parameters behind the verdict, then further details
Parametere4Greystone
PriceFreeFree
Rating4.2 (5 ratings) — better—
Positive reviews50.0% of reviews—
Number of ratings5 — better—
Update frequencyEvery 2 months — betterEvery 3 months
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS7.0 — better15.1
Further details — not scored
Size59 MB32 MB
Age rating4+4+
Developere4Greystone Theological Institute

In-app purchases

10 purchases

e4

One-time10
  • Christianity: the Future$0.99
  • Medical Ethics$0.99
  • Media Culture$2.99
Show 7 more
  • Martin Luther$3.99
  • Biblical Stewardship$4.99
  • Apologetics$4.99
  • Faith & Science$4.99
  • re:Formation$4.99
  • The Divine Conspiracy$4.99
  • The Provocative Church$4.99
3 purchases

Greystone

Subscriptions3
  • Greystone Monthly Membership$17.991 Month
  • Greystone Membership Plus$29.991 Month
  • Greystone Annual Membership$197.991 Year

Questions

Is e4 free?
e4 is free to download, with in-app purchases available.
Is Greystone free?
Greystone is free to download, with in-app purchases available.
Do e4 or Greystone have ads?
Neither e4 nor Greystone shows ads.
Which is updated more often, e4 or Greystone?
e4 ships an update every 2 months, and Greystone every 3 months. Most recently, e4 was updated on October 6, 2026 and Greystone on October 11, 2026.

Other comparisons